An Exeter man pleaded guilty Wednesday to helping another man who robbed a pharmacy in Guilford, a case that also involved the Somerset County Sheriff’s Office.

Clifford Sprague, 37, of Exeter, entered the guilty plea in U.S. District Court in Bangor to being an accessory after the fact in connection with the robbery, according to a news release from U.S. Attorney Thomas E. Delahanty II. The charge involves someone who knows that a criminal offense has happened and assists the offender in order to hinder or prevent his apprehension, trial or punishment.

Michael Thompson, wearing a bandanna, hood, sunglasses and gloves, robbed the Rite Aid pharmacy in Guilford on March 10, 2012, according to court records. Thompson jumped over the pharmacy counter with a large hunting-style knife and demanded prescription drugs, and the robber filled a backpack with $5,000 worth of narcotics, according to the release.

“After the robbery, Thompson called Sprague, told him that he had robbed the pharmacy and asked Sprague to pick him up in his car. Sprague did so,” the release states.

Shortly afterward, Sprague saw a Somerset County Sheriff’s Office cruiser, slowed his car and told Thompson to get out. The robber fled into the woods, according to the release, which also says Sprague later used and sold some of the prescription drugs stolen from the pharmacy.

Thompson was sentenced June 29 to 82 months in prison in connection with the pharmacy robbery.

Sprague faces up to 10 years in prison and a $125,000 fine. He will be sentenced after a pre-sentence investigation report by the U.S. Probation Office.

The investigation was conducted by the Piscataquis County Sheriff’s Office, the Maine State Police, the FBI and the Somerset County Sheriff’s Office, according to the release.